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Research guides

Buying, verifying, storing and combining peptides

The questions researchers ask most, answered at length. Written for a European readership, with links to every profile a guide mentions.

Buying guide9 min read
Buying Research Peptides in Europe

What to check before you order: certificates, EU delivery times, customs outside the EU, medicines law and the rules for athletes.

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Fundamentals7 min read
What Are Research Peptides?

Amino acid chains, receptors and half-lives explained, plus the difference between an authorised medicine and a research compound.

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Quality8 min read
How to Read a Peptide Certificate of Analysis

HPLC chromatograms, mass spectrometry, lot numbers and the red flags that give away a generic or doctored certificate.

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Lab protocol7 min read
Storing and Reconstituting Research Peptides

Temperatures for powder and solution, bacteriostatic water, handling technique, shelf life and what a vial goes through in transit.

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Comparison8 min read
Semaglutide vs Tirzepatide vs Retatrutide

One, two or three receptors: mechanisms, half-lives, headline trial results and regulatory status of the incretin peptides side by side.

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Comparison8 min read
Growth Hormone Secretagogues Compared

Ipamorelin, GHRP-2, GHRP-6 and hexarelin measured against each other, and where GHRH analogues such as CJC-1295 and tesamorelin fit in.

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Advanced7 min read
Peptide Combinations in Research

Why GHRH analogues are paired with ghrelin mimetics, why BPC-157 so often meets TB-500, and what the evidence does not show.

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DailyResearch blog
A new research article every day

Short, sourced reads on peptide science, quality control and the European market.

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Order peptides with a certificate behind every lot.

Dispatched from the Netherlands · 99%+ HPLC purity · lot-specific CoA · 3–5 business days across the EU.

Order at King Peptides Research use only · ships from the EU